Practicing Hand Cut Dovetails

So for whatever reason, I decided that I wanted to learn how to make hand cut dovetails. I don’t really have an implementation for it on a project yet. I just wanted to start trying something new, and begin acquiring skills that I haven’t tried before. These are all cut tails first. So far I’ve got 4 sets made, and you can clearly see the improvements…
First off, I tried on a scrap piece of random pine that I had. Needless to say, they’re not very good...

Alright, I’ve got another “batch” of dovetails. I feel like I’m getting a little bit better at it.
I was especially proud of the left one on #8… it’s the tightest most gap free one I’ve done yet
As always, any helpful comments are much appreciated :-)